<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../jquery-3.3.1.min.js"></script>
    <style></style>
</head>

<body>
    <button id="up">分数从小到大排列</button>
    <button id="down">分数从大到小排列</button>
    <table id="ctn">
        <!-- <thead> -->
        <!-- <tr>
	                <th>姓名</th>
	                <th>年龄</th>
	                <th>学号</th>
	                <th>分数</th>
    	            </tr> -->
        <!-- </thead> -->
        <!-- <tbody>
    	            <tr>
    	                <td>赵四</td>
    	                <td>22</td>
    	                <td>3</td>
    	                <td>90</td>
    	            </tr>
    	        </tbody> -->
    </table>

</body>

</html>